Phylum: Charophyta Family: Desmidiaceae
Xanthidium basidentatum (Børgesen) Coesel
Described as rare on the continent; of unknown rarity and distribution in Britain. Found in moorland pools and bogs
References:
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands